The patch below does not apply to the .39-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From f506b3dc0ec454a16d40cab9ee5d75435b39dc50 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra <[email protected]> Date: Thu, 26 May 2011 17:02:53 +0200 Subject: [PATCH] perf: Fix SIGIO handling Vince noticed that unless we mmap() a buffer, SIGIO gets lost. So explicitly push the wakeup (including signals) when requested. Reported-by: Vince Weaver <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Cc: <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Ingo Molnar <[email protected]> diff --git a/kernel/events/core.c b/kernel/events/core.c index c09767f..d863b3c 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -5028,6 +5028,14 @@ static int __perf_event_overflow(struct perf_event *event, int nmi, else perf_event_output(event, nmi, data, regs); + if (event->fasync && event->pending_kill) { + if (nmi) { + event->pending_wakeup = 1; + irq_work_queue(&event->pending); + } else + perf_event_wakeup(event); + } + return ret; } _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
